我的应用是一个Java Web应用程序(WAR)，使用Apache Camel以及（其中之一）CXF-RS和相应的Camel组件作为JAX-RS的实现，向外界提供RESTful服务。
当使用HTTP POST和有效负载调用其中一个端点时，我会得到以下异常堆栈跟踪。请注意，com.foo.FooService和com.foo.Foo类是JAXRS注解的服务/资源对。
我特别困惑的是create()方法实际上被调用了，因为我的理解是，CXF-RS for Camel会执行某些魔法来拦截传入的请求并将请求路由到Camel路由中。
这些是类的简化版本:
@XmlRootElement
@XmlAccessorType(XmlAccessType.FIELD)
public class Foo implements Serializable {
// some getters and setters go here
}
@Path("/")
public class FooService {
public FooService() {
}
@POST
@Path("/foos")
@Consumes("application/xml")
public Response create(Foo foo) {
throw new UnsupportedOperationException();
}
}
在我的Spring XML中，我将cxf:rsServer配置如下：
<cxf:rsServer id="fooServer" serviceClass="com.foo.FooService" address="/foorest"/>
路由在Java中的定义如下：
from("cxfrs://bean://fooServer").id("foo-restadapter-route")
.to("jms:queue:foos").inOnly();
这是我得到的异常信息：
SEVERE: Error occurred during error handling, give up!
org.apache.cxf.interceptor.Fault: null while invoking public javax.ws.rs.core.Response com.foo.FooService.create(com.foo.Foo) with params [com.foo.Foo@1ed43997].
at org.apache.cxf.service.invoker.AbstractInvoker.createFault(AbstractInvoker.java:159)
at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:133)
at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:133)
at org.apache.cxf.jaxrs.JAXRSInvoker.invoke(JAXRSInvoker.java:82)
at org.apache.cxf.interceptor.ServiceInvokerInterceptor$1.run(ServiceInvokerInterceptor.java:58)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
at java.util.concurrent.FutureTask.run(FutureTask.java:138)
at org.apache.cxf.workqueue.SynchronousExecutor.execute(SynchronousExecutor.java:37)
at org.apache.cxf.interceptor.ServiceInvokerInterceptor.handleMessage(ServiceInvokerInterceptor.java:106)
at org.apache.cxf.phase.PhaseInterceptorChain.doIntercept(PhaseInterceptorChain.java:243)
at org.apache.cxf.transport.ChainInitiationObserver.onMessage(ChainInitiationObserver.java:110)
at org.apache.cxf.transport.servlet.ServletDestination.invoke(ServletDestination.java:98)
at org.apache.cxf.transport.servlet.ServletController.invokeDestination(ServletController.java:423)
at org.apache.cxf.transport.servlet.ServletController.invoke(ServletController.java:139)
at org.apache.cxf.transport.servlet.AbstractCXFServlet.invoke(AbstractCXFServlet.java:142)
at org.apache.cxf.transport.servlet.AbstractHTTPServlet.handleRequest(AbstractHTTPServlet.java:179)
at org.apache.cxf.transport.servlet.AbstractHTTPServlet.doPost(AbstractHTTPServlet.java:103)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:637)
at org.apache.cxf.transport.servlet.AbstractHTTPServlet.service(AbstractHTTPServlet.java:159)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:290)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.netbeans.modules.web.monitor.server.MonitorFilter.doFilter(MonitorFilter.java:393)
at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:235)
at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:206)
at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:233)
at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:102)
at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:109)
at org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:298)
at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:852)
at org.apache.coyote.http11.Http11Protocol$Http11ConnectionHandler.process(Http11Protocol.java:588)
at org.apache.tomcat.util.net.JIoEndpoint$Worker.run(JIoEndpoint.java:489)
at java.lang.Thread.run(Thread.java:662)
Caused by: java.lang.NullPointerException
at org.apache.camel.component.cxf.jaxrs.CxfRsInvoker.getContinuation(CxfRsInvoker.java:63)
at org.apache.camel.component.cxf.jaxrs.CxfRsInvoker.performInvocation(CxfRsInvoker.java:52)
at org.apache.cxf.service.invoker.AbstractInvoker.invoke(AbstractInvoker.java:89)
... 33 more